| A | B |
|---|
| minerals | natural, nonliving solid crystals that make up rocks |
| luster | the way a mineral's surface reflects light |
| sedimentary rock | rock that forms when sediments are cemented together and harden |
| igneous rock | rock that forms from molten rock |
| metamorphic rock | rock that has changed as a result of heat and pressure |
| magma | hot fluid material below Earth's crust from which lava forms |
| mohs scale | a scale of hardness used in classifying minerals |
| streak | the color of powder a mineral leaves behind |
| weathering | a gradual wearing away or changing of rock and soil |
| sediment | earthy material that has been moved and laid down on Earth's surface |
| molten | incredibly hot, melted |
